Grinding-machine.



BST AVAILABLE copV c.l BOOTH I AI C. PAGE,

GRINDING MACHINE.

APPLICATION FILED IurIL I'7, I9I5.

c.' BOOTH L A. c. PAGE.

GRINDING MACHINE.l APPLlcAloN FILED JUNE 17, 19'15.

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HEET 2.

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fwenwrs: nIOO 5 SHEE Il Smm Patented Nov. T, 1916.

red Char l l T Il BEST AVAILABLE CF" C. BOOTH 2 A. C. PAGE. @moms MACHsNE.

MPLICATIGH FILED 'UNE I7, 1915. sfwf @qv Patented Nov. T, 1916.

5 SHEETS-SHEET 3.

@y .flac-rma BEST AVAILABLE Corh C. BOOTH & A. C. PAGE. GRxNmNG MACHINE.

APPLICATiON FILED lUNE l?, lSl.

1,203,844, Yztente. Nov. 7", i916.

5 SHEETS-SHEET 5.

4grind surfaces of revollition.

CLEMENT BOOTH, OF NARBET, AND ALFRED CHARLES PAGE, 0F PHILADELPHA,

, PENNSYLVANIA. l

' GnINDING-MACHINE.

Application ledJun'e 1"7, 1915. v Serial No. 34,602.

Twill/whom tw/ay concern: fi

Be it known that we, (PLmrhN'r BOOTH and Umano @nannies PAGE, iespectivcly, a citizen of the United States, residing at Narberth, ltlontgomery county,` Pennsylvania, and a British .sulujech` residing at lhiladeltphia, Philadelphia county, Pennsylvania., have .jointly invented certain improvements in (l1-inding-Machines, of which the following a specification. "f

vUurinvention is a machine designedvto Its characteristic purpose is to provide improved i'nechanism for multiplegrinding, and particularly for simultaneously roughing and finishing surfaces ot.' differentarticlesby different-operations while further` articles t0 1he successively roughened and finished are yplaced in the machine.

The characteristic features of our im proved mechanism are fully disclosed inthe following description and the accompanying drawings in illustration thereof.

ln the drawings, Figure 1 is a brokenfront elevation of a machine embodying our improvements; Fig. 2 is a part sectional rear elevation of the same; Fig. 3 is an end elevation of the turret carrying the work spindles; Fig. 4 is a part sectional 'elevation oi" the. right end of the machine: Fig. 5 is a sectional view ot. details of the construction shown in Fig. 4t for adjusting the upper grinding wheel; Fig. 6 is a. sectional vieW 0f details of the construction shown in Fig. 4 for adjusting the lower grinding wheel; Fig.

7 is a part sectional elevation of the left end ofthe machine; Fig. 8 is a part sectional l plan View ot' mechanism for operating the Work spindles; Fig. 9 is a plan view`of the change speed gears for operating the grind*-` ing Wheels; Fig. 10 is a part sectional plan vienv` of the controlling mechanism for the grinding `table and Wheels; Fig. 11; is a part sectional side elevation of the construction v shown in Fig. 10.

"Generally stated, the mechanism is de' signetlfto intermittently revolve a turret l nwliich are journaled the Work spindles 2,52 and 2" (adapted to' be revolved in pairsin combination with a reciprocating .table 3 in which are journaled the arbors 4 and 4" of grinding Wheels-and adapted tobe moved into contact with the Work to be ground thereby and to be Withdrawn therefrom, the grinding Wheels respectively ef- Specification of Letters Patent.-

kg'wheels 9', 10'., 11 and wl fecting roughing and finishing operations upon separate articles while a furthe-r ar Patented'nov. 7. fem,

ticle isbeing placed for the successive:roughj ing and -finishing operations of then/heels. j

The bed 6 of themacliine has a driying lshaft 7 journalcd` on the-"near thereQtand. driven bya' pulley 3, andltheishaft hasizwd thereon the, spur Wheels 9, `10, 11 and 12,

which engage with the y y W revoluble on the shaft 13 and adapted tobe automatically fixed thereto by the. respective `conventional lfirespective roller clutches '14s, the latter being held out Y. ot` engagement normally by dogs 15 engaging project-ions 14 on the roller clutch cages.

j The dogs 15 arev adapted to'turn on a stationary shaitt16 and have fixed thereto the respective arms 15.v These arms' bear against revoluble shaftl? which is provided with lugs 17 for striking and rocking the respective arms to effect the Withdrawal of the corresponding dogs from the projections 14?, whereby the clutches are permitted to act, the lugs on the shafll'` being sfr placed thattbut one actsat `a time and the speed being 1n correspondence With the ratlos of the gear tram in action.- The shaft 17 is provided with a helical gear 17 which engages with thehelical gear 18 on a shaft 18 turned 'by a crank handle 18', by which the speed of revolution of the shaft 13 is determined. i Y

The shaft 13 has a double clutch sleeve 2O splined thereon and reciprocated by an arm 21 provided with a yoke 21 Which engages the circular channel 20 of the sleeve,

the latter being shiftable alternately intov engagement with the clutches 22 'and 23 on the respective bevel pinions 22,` kand l23 which are loose on the shaft 13., whereby the -bevel pinions are alternately fixable to `anll A journaled. vshaftrevoluble by the shaft.

24 has xed thereon al bevel gear I25, which .Y

engages with the pinions 22.` and 23 and is pinions alternately to the shaft 13.

A gear wheel 25 is fixed on the shaft 24 and engages a gear Wheel 26 fixed on a clutch 26', the parts 26 and 26 being loosely mounted on the journaled shaft 27. A pinion 30 fixed to the Wheel 26 engages the raclr'Rlf czilthelta-ble 3 to reciprocate the latter.

A clutch 27 is splinedfon the shaft 27 and is adapted to he yshifted longitudinally revoluble in reverse directions by fixing thethereon by a rod 28 which is adapted to reciprocate Within the shaft and s connected with the clutch by the pin 28', the latter being movable in a slot 27 of the shaft. A hand wheel 29 is fixed on the shaft 27 and serves, through the dependent mechanism, to effect an independent operation of the table 3.

The arm 2l is fixed on a journaled shaft 30 which has fixed thereon an arm 31. This arm is connected by a link 32 with a lever 33 having a fulcrum 33.A A rod or link 34, which is pivotally connected at its opposite ends to an oscillating arm 35 and a lever. 36, has lugs 34 thereon which lie on either side of the lever 33 so as to permit it a limited independent movement with respect to the lever The lever 36 coacts with a detent 37 which is pressed by a spring 37', the

lever being movable past the detent by de-A pressing the latter against the action of the spring and being thrown when past the dead center position by the action of the spring through the detent.

A striker 3 on the slide 3 of the table 3 is adapted to engage, on the rearward movement thereof, the lever 33 which is rocked th^reby to operate the link 32 and throw the clutch sleeve 20 to the neutral position, the link acting on the sleeve through the intermediate parts 31, 30 and 21.

A bearing 38 on the slide 3 has journaled vtherein a shaft 39 on which is fixed a lever 40 provided with a striker 40 and a roller 40, the striker being adapted for engaging the projections 34 fixed to and adjustable on'the link 34 and the roller being adapted for enga ing a cam 41 fixed to and adjustable on t 1e way 41. lVhen, by the rearward movement of the slide 3, the striker 40 engages the right projection 34, the link 34 and the lever 36 are shifted thereby to the position shown in Fig. 1. That is to say, the lever is forced past the detent 37 by pressing it down against the spring 37 and is thrown and retained in the position to which it is thrown by the rise of the detent, the movement effecting the further movement of the link 34 and engaging the clutch sleeve 20 with the clutch 23 by the action of the link through the parts 33, 32, 31, 30 and 21. The movement of the slide 3 in the opposite direction causes the striker A40 to engage with the left projection 34, whereby the link 34 is shifted and acts through the parts 33, 32, 31, 30 and 21 to shift the clutch sleeve 20 into engagement with the clutch 22., the detent 37 acting on the lever 30 \vhen"past the vdead center position to effect the full throw of the mechanism. In the movement of the \`slide 3', as the striker 40 travels between the projections 34, the roller 40 engages the inclined surface of the cam41, which rocks the lever 40, thereby turning the 'shaft 39. This movement of the shaft 39 rocks an arm 50 fixed to the bearing .cylindrical sleeve 46".

42, which liesbetween collars 43 on a longitudinally movable rod 43, the lever and rod beingr held in the desired position by the coaction of a notched arm 42 on the lever with a detent 42@l pressed by'a spring 42". The rod 43 is provided with the slotted clevis 43 which' is loosely engaged with a dog 44 through a pin 44 thereon, the clevis having a limited movement independent of the pin.

The dog 44 is adapted for engaging a projection 45 fixed to the roller clutch cag.. 45, and is provided with a `lug 44 to be engaged by a lug 46 on the plate 46 to disengage the dog from the projection and with the roller 46b for engaging the lug to throw the dog back into position for rengaging the projection.

'lhe roller 46" is made adjustable on the plate 46 by providing the latter with the circular T-slot 46', ,in which is engaged a T- bolt 46" having the roller journaled thereon.

A peripheral cam 46 on the plate 46 is adapted for engaging a cam 51 on a lever 51 which is thereby caused to enga e the clevis 43 to move the rod 43 longitu in the direction of the arrow. Thus the arm 42 and lever 40 are rocked so that the striker 40' is moved out of line with the projections 34, the arm 424 being thrown from the position shown in Fig. 10 in the direction of the arrow and held by the detent 44 in its second position.

The plate 46 is fixed to a sleeve 46, which is journaled in a bearing 3a of the table 3 and revolved by a pinion 47 fixed thereon. A shaft 48 is journaled in the sleeve 46 and revolved by the clutch cage 45 which is fixed thereto, the shaft having fixed thereon a planetary gear cage 48. A stub shaft 48" is carried by the cage 48 and has jo-urnaled thereon the connected' differentials 49 and 49', the latter meshing with the pinion 47 and the former engaging a stationary gear 3 concentric with the The pulley 52, loose on the shaft 48, is engaged thereto by the roller clutch mechamsm comprising the part 45, and is driven inally n by a belt 53 passing over the shaft '7 andiI l movable along the same with the longitudinal recprccation of the grinding table 3.

The sleeve 46l has lixed thereon two cams 54 and 55 on which ride the arms 56 and 57' of the levers 56 and 57.

A slide 58 is movable on a way 3" of the table by a spring 59 which is connected with the table byl'a bolt 60 and bears against al lug 58 on'the slide, the movement of the lslide being regulated by the lever 56 whose arm 56 engages an adjustable stud or screw 58 on the slide, and the`v movement of the lever being regulated by the engagement of its arm 56 with the periphery ofthe cam 54.

A slide 61 is movable on the slide 58 by means of a screw 62 whichy is journaled in theslidb 58 and feeds through the lug 61 on Ithe slidev 61, `the screw being turned hya.r

,hand ,Whee1-62. VA bearing 6l on the'slide t {t61- hasfjournaledntherein thearbor if of the 5 flower grinding Wheel 5. Itwill be underffstoodithat 'the` Wheel 5 is moved in a direc# tion *transverse toits axis by 'turning the lit-and wheel 62, which acts through. the parts .sel 'rn Wheel gis s'mil'a'rly journaled in a bearing `-ii-slide 64 byi.r a. rer/fr.. A65` operated. by a hand wheel Gli, the crertffengaging a lug 63 of the slide Gi Q rlhis@me f :hzmism is provided `Witha lug`64. ppring Strand bolt 6,7 similar A toand foi,1 the' salmejpurpse asthe parts 58,

59 and 60.,V n

A' v'fl-he'slide 64' has pins 6.4 movable longif tudinally thereinand supportedy byV a rev'- ol, bleface cam 68 provided with the circu-V lar carni groove' 68, Whichgengages corresponding endsv of the pins softhat either may 'l be thrust 'forward to 'regolate the relation of the lever 57 to the slide. lt will be unzelt-lf derstood that the contact'of the revolving 3.0' cam" 55` with the arm- 57 of the lever 57 l" causes they arm 57 to actthroughthe con--A 'tacting pin 64 upon the slide 64, the cam limiting thefaction otthes'pring in movyingthe slide-andgpositioningfthe grinding Ywheel 5 with reference to the "Work 'The spindles 4 ande harepulleys la and l@thereon over which and the driving pulley 691'passes a driying belt 7 O. The belt `is 'tightened by a. pnlley 71 carried by anarm '40, 72, Which-is tulcrnmed on the slide 60 `and jy actuated tohold the'pulley by a spring 7 3 connected to thevarm y72 fixed to the arm 72. *The spindles 2 and 2 hold, `byrmeans of "chucks 2"%-and 2b` thereon, rings '2? and 2`to be ground by the .roughing Wheel 5 and fini'shing Wheel erespectively, While the third ychuck 2 onfthe spindle 2 is having anundressedring .2t placed therein.

When the roughing operation on, the ring 2dand the finishing operation on the ring 2e have been completed, the table '3 is moved back 4to Withdraw the Wheels 5 and 5 and thepartial revolution of ,the'turretis efytected to more the yundressed ring 2f into...l

sline ,with y they wheel 5, the roughlylinished ring 2d .intolinewith the finishing Wheel'l 5, and-the'nished ring 2e into position for removal and the' substitution oit 'an .undressed i yring, thereforr y i. i y l A. Thedesird -'ntermittent revolution of the Kturret 1 ,,iyhichisjournaled in bearings 74 and 7 f -ioffthe housing 74C, is effected by ,aspur Wheel 75/,vxed-to the rearthereof and ,y.jo''rivenj by/the spurI Wheeh7 on afstub sha-tt 653.77 The Wheel1 is .driven yaspurfwhc'el 78 which is fixed on a sleeve 79' of a roller "clutch mechanism 79, the latterbeing reyg' oluble on the shaft 80 having the driving pulley 8,0. fixedfthereon. The clutching (deel-l vice 79 isiadaptedto be l auttnnatically" e -tjo gaged to 'the spur "Wheel 8l `which is'fixed y on the shaft 80, and is released through'th'eeiigagement of thev lug bya 'dog82A fixed on .a shaft 82, the latter having an' arniSQ fixed thereon on which is archer-82, ,",This' 75 roller rests upon the periphery .of the turret l which is provided with three flat or cam surfaces 1 adapted for registration -with the x roller. ,Y y l y i .A handle 83 is vfixed on a journaled shaft .so 83 Which has fixed thereon a voke 83. "This yoke engages a collar Si Whichhasa limited movement onthe pin 85, a coiled spring being disposed on the pin between Yits bean ing 85 and the collar 8l. T he'pin'-85,j vliicll'iA g5 is adapted for engagement in recesses 1". spaced degrees apart in the periphery of the turret l, is engaged by an arm STV'fixed A "on ,a journaled shaft 87, the latter an arm 87 fixed thereon. A link Scon- 90 nects the arm 87' with an arm 82") fixed-on the shaft S2. v p i" lVhen the handle 83 operated, litwae ,t through the intermediate mechanisrn-.' de ""t scribed, to Withdrawthe piny S5 from its gagement withftheturret l', and, b v lre on of a. l" nit'ed movement of the pinff independent of the arm S7', subsequentlyacts. through the intermediate meclianismfdel scribedto withdraw the dogI 8 2 froinfits 13A `engagement with theprojertion 792 Thfe turret is thereby permitted to 'i vvre'volife.

.through the action ofthe pulley SOand the intermediate mechanism 'previouslyk dell scribed-` lVhenthe-turrethas moved through 17? approximately l2() degrees theroller 82? reg# V isters with the succeeding .cani surface l yand 'the spring actuated bolt 85 positively. shifts the dog 82 to r position for engaging vthe projectionlQ/gthe "clutching, mechanism 113 coi'nprising thdpart 79 being disengagedand the bolt engaging .the turret",` 'whichA is stopped with the spindlesin position for a further operation. i i l" restrained by aA spring-,89, is connected by a link' 90 with a lever 91,-the latter har# ing a roller- 91' thereon. A.' crank leverl 92 is provided with the bifurcations 92 adapted to be struck bya roller `3*on the slide 3. 123

andwith the arm 92 adapted .for 'engaging the roller 91 Wherebythe bolt 85 is locked in engagement with and holds'the tilrretfl .during thelg'rindi-ng operation. "Whenfat the end of tliisfoperation, the table 3 'is125 moved backward. theroller 39 passes over the first bifurcation' 92', strikes the second,

and rocksy'the lever 92, thus disengaging the y farm 92 from engagement With the roller ,911 'Pene fiile "the lOve-'etre ef. the l The shaft 83 haslfixed thereon 115A mechanism which withdraws the pin or bolt 85. When the table is again moved to the forward'position, to position the mechanism for effecting the succeeding grinding operation, the roller 3a passes over the nearest bifurcation 92', strikes the second and rocks the lever 92, whereb. the arm 92 rengages the roller 91 and the bolt185 is caused to lock the turret 1 inthe second position.

The spindles 2, 2 and 2 are revolved by the pulley S0 through the. shaft 80, clutch T9, and spur wheel 81 which drives a spur wheel 93 that is loose on the journaled shaft 94 and adapted to be fixed thereto by the roller ratchet 95.

The shaft 94 acts through thespur wheel 9G fixed thereon to drive '1t spur wheel 97 fixed on a shaft 98, the latter having fixed thereon a sprocket wheel 99 which acts through a chain 10() to fili-ive a sprocket wheel 101 fixed on the journaled shaft 102.

A spur wheel 103 is fixed on the shaft 102 and engages the gears 104, 104 and 104 on the respective work spindles 2, 2, and 2, the gears on the spindles being automatically fixed thereto by respective roller clutches 105, 105, and 105". These clutches are respectively kprovidedwith -lugs 105, adapted to be engaged, successively as the turret is intermittently revolved, by a, dog 10G, so that the4 spindle to which work is being applied shall remain stationary while the others revolve the work held thereby in engagement with the grinding wheels 5 'and 5.

The shaft 94 has a double clutch sleeve 109 splined thereon and movable into engagement with the clutch 110 on the spur wheel 110 and the clutch 111 on the spur wheel 111 alternately, the sleeve being shifted by means of a crank 112 having a yoke 112 which engages the sleeves channel 1,09.

The wheels 110 and 111 mesh with the respective spur wheels 113 and 114 fixed on the shaft 80.

When it is desired to increase the speed of revolution of the work spindles 2, 2 and 2" beyond that obtained by the described action through the wheel 93, the crank 112 Y is operated to engage the 'wheel 110 or 111 to the shaft 94, depending upon, the particular speed desired, and this shaft is thereby revolved at a speed -greater than that otherwise transmitted through the wheel 93' so that the latter now revolves idly, since its clutch 95 will not engage.

It willA be understood that the grindin wheels 5 and 5 are reciprocated in the wor by a limited reciprocation of the table 3 .through the automatic action of the mecha- Y nism, for, as has been shown, as the table reciprocates its movement is ysto ped and reversed by communicating the tab es movements through the parts 34, 33, 32, '31, 30

and 21 to the driving clutch sleeve 20, to reverse its connections. 'y

In both the forward and rearward movements of the table 3, the engagement of the roller 40 with the cam 41 operates the levers 40 and '42, applies tension to the rod 43, withdraws the dog 44. from the projection 45, permits they corresponding clutch mechanism 45 to engage the shaft 48 to the pulley 52 and causes the shaft to ,intermittently operate the sleeve 46 with the cam plate 46 thereon, through the planetary train 48', 49, 50, 49 and 47, the cam plate being advanced a step by each reciprocation Y of the table and the dog 44 being automati-v callyv actuated by a spring 44b to rengage the projection 45', disengage the clutch and restore the parts 43, 42, 39, 40, 40' and40 to normal position. After the necessary' limited reciprocations of the table or carriage 3, the intermittently turning cam plate 4G causes the engagement of its cam 46e with the cam 51', rocks the lever 51, shifts the rod 43 in the direction of the arrow thereon, and throws the levers 42 and 40 so that the striker 40 is moved out of line with the projections 34, the mechanism being held in this position by the engagement of the detent 42 with the arm 42 in the second position to which it has been shifted.r The table/3 is thus permitted to continue its rearward movement until the rojection 3 contacts with the arrn 33 and t rows the clutch 20 to its neutral position. As a 'art of this operation, the lug 46 onthe p ate 46 engages the lug 44 on the dog 44 which is thrown back and throws its notched arm 44b to its second osition with relation toa detent 44` pressedp by a spring 44", the arts being held in this position andl the c utch continuing to ac t until the revolution of the plate 46 causes its roller 46" to engage the roller 44, the dog being thereby thrown back to position for rengaging t e clutch member 45 and the spring 44 acting to hold it in this position. Asa further part of this operation, the roller 3 throws Athe cr. nk lever 92 and disengages the lever 91 so that the pin 85 can be withdrawn from its engagement with the turret 1. The table 3 having reached the limit of its rearward movement, the operator presses down upon the handle 83 and rocks the shaft' 83 which acts through the yoke 83 to withdraw thepin 85 from its engagement with the turret 1, and the pin acts through the'parts 87",

87, 87", 88, sa and sato withdraw the d 82 from the lug 795," whereupon the clutc device 79' engages' and the turret is revolved to bring the spindles 2 and 2 in line with the respectivewheels 5 and 5. The

turret is automatically stop and locked through the registration o the roller 82* with a corresponding cam surface 1'; the

plunger 82c being; actuated by the spring 82d to cause the dog 82' toA engage the lug 7 9=,v which disengagesthe' clutch 7 9 and the pin 85 being elevated by the' spring 89 to enter a turret recess 1,

then vthrown farther manually'to cause-theclutch sleeve to engage the clutchJ 23,` f whereupon the table 3 is'caused to move forward to rengage the wheels 5 and 5" with the work by the action oflthevshaft 13 through the intermediate parts 120, 23,

. 23', 24, 25', 26, so, and 31, the pin ssa-being locked in engagement with the turret 1 by the action of the roller 3a on the lever 92 so as to cause the arm 92 to act 4on kthe 90, 83a, 84E*- and 86.

Havlng described our invention, we

' claim:

j?" 1. In 4a grinding machine, al ievolublei turret, a plurality of'workholding spindles jinirnaled in` said turret, mechanisms for revolving said spindles, and means for disengaging' mechanism for revolving the respective spindles, whereby they are thrown ont of action, in combination with a reciprocating device, a .plurality 'of spindles journaled in said device, and tools carried byy said spindles second named for operating nlwork carried by said spindles first named? 2. 'In a grinding machine, a revoluble tur- `ret, a plurality of work holding spindles jmirnaled in said turret, mechanisms for revolving saidspindles, and means controlled 'by ksaid turret for disengaging in succession ,the mechanisms for revolvlng the respective spindles, 1n comblnation with a reciprocatljournaled insaid turret, mechanisms cem-y prising clutches., for revolving said spindlesl and means for disengaging the respective clutches in succession by the' intermittent revolution of said `turret, 1n Acombination with afreciprocating carriage, spindles journaled in said carriage,'grinding wheels caryried by said spindles second named foractfing upon work-j'revolved by lsaid,,spindles irst named, and means for automatically rey .ciprocating sald carriage.

4. In a grinding machine, a revolubletur-v jret, mechanism for revolving said turret,.- Imechanism for automaticallystopping said y l y'fsaiddo'elring mechanism eects the engage'- 'inent of said driving mechanism, a plurality d 'oitspindles journaled in said turret, kmechaturretinpredetermined positions, a plura ity. of work holding spindles journaledfin said turret, mechanisms for revolvingsai spindles., and means for disengagmg the mechanisms for revolvlng lthe respective f spindles in predetermined positionsthereof,

in combination with a reclprocating 'car- The lever 33 is Y roller ill', which acts through the parts y .17: riage, lspindles journaled in said carriage, andgrinding wheels carriedby saidv spindles second. named Jfor operating on work carried by said spindles irst named. I, In a grinding machine, a revol'uble turret, mechanism for revolving said turret, mechanism for locking said turret in pref determined positions', a plurality of work holding spindles journaled in said turret,

mechanisms for revolving said spindles,` and I i meansfor disengagmg vthe mechanisms for revolving the respective spindles in succes- *sion'inpredetermined positions thereof, in

combination with a reciprocating carriage, spindles Journaled 1n said carriage, 'means whereby sald 'spindles last named are adapted to be reciprocated transversely to ithe direction of reciprocation of ysaid carriage,

and grinding wheels "carried by said spin- V dles last named for operating on work irevolved bysaid spindles first named.

6. In a grinding machine, a revoluble turret, mechanism for revolving said turret, mechanism for automatically stopping andlocking said turret inl predetermined'posivlttions,:a plurality of work holding spindles j'ournaled in` said turret,4 mechanisms comprising clutches for revolving said spindles,

,and means for automatically disengaging the clutches of the respective spindles in predetermined positions thereof, in combifor acting onwork carriedby spindles first nation with a reciprocating carriage, spinl dles journaled in ysaid carriage, grinding lwheels carried by said spindles last named rocating said carriage with' said wheelsin contact with said work. f

7. In a grinding machine, a revoluble turret, mechanism for automatically engagin and holding said turret'in predetermined positions, mechanismA comprising .a cliitch for revolving said tur-ret,- mechanism whereby the operation osai'dV mechanism first named to release said-turret disengages said clutclh-t'" permity said mechanism secondnamed' to revolve* said rturret, `and mechanism operating under control of said turret `v`vhereby in predetermined positions thereof y 'said clutch is automatically disengaged..`

8. In a grindingmachine, a revoliible tur- 'i ret,v driving mechanism` for .revolving said turret, means 'for disengaging said Ydriving mechanism, locking mechanism for holding said 'turret' in predeterminedpositions, imeans' fomdisengaging saidlocking mechal msm,1means whereby the disengagement of nisms for yrevolving said spindles, and means for disengaglng sa1dmechanisms last named 1n predetermined positlons of said turret.

9, In a grindingflmachine, -a revoluble turret, driving mechanism for revolving said turret, means for automatically disengaging said driving mechanism and locking said turret in predetermined positions thereof, a plurality 'of work holding spindles journaled in said turret, means coordinated with said driving mechanism for revolving said spindles, and mechanism for automatically disengaging the driving means for the respective spindles in succession in predetermined positions thereof.

turret having a gear thereon and driving named, and xdriving mechanism mechanism comprising a revoluble shaft, a gear loosely mounted thereon, means for clutching said gear to said shaft, and a gear connecting the gears aforesaid, in combination with Work spindles journaled in said turret, gears on the respective work spindles` clutches for fixing the gears lastnarned to the respective work spindles, a gear for revolv-ing said gears last named, and driving mechanism connecting said gear last named with said shaft.

l2. In a grinding machine, a revoluble turret having a gear thereon and driving mechanism comprising a revoluble shaft, a gear loosely mounted thereon, clutchingA means for engaging said gear to said shaft, a gear connecting the gears aforesaid, and means for automatically disengaging said clutching means, in combination with work spindles journaled in said turret, gears con-4` nected with the respective work spindles, clutches for fixing the gears last named to the respective spindles, means for automatically disengaging said clutches in succession in a predetermined position of said .spindles, a gear for revolving said gearsl last conne-iting said gear last named with said shaft.

13. In a grinding machine, a revoluble turret, mechanism comprising a clutch for driving said turret, and means whereby said clutch is automatically disengaged and saidturret is stopped in predetermined posi? tions, said means comprising an oscillating dog for disengaging said clutch, an oscillating arm fixed to said dog, a cam on said -turret with which said arm is adapted to e11- gage, a reciprocating bolt for engaging said turret, and means connecting said bolt with said dog and arm.

14. In a grinding machine, a revoluble esaid spindle,

turretprovided with a cam, mechanism comprising an automatically actingclutch for revolving said turret and means whereby said clutch is automatically disengaged and said turret is held in predetermined positions, said means comprising an oscillating dog for acting on said clutch, an oscillating device fixed to said dog and adapted to register with said cam, and locking device for holding said turret,` and means connecting said locking device with said oscillating device and dog whereby their actions are co ordinated.

15. In a grinding machinea revoluble turret provided with cams', mechanism comprising an automatically actlng clutch for revolving said turret, and means whereby said clutch is' automatically disengaged and said turret is held in predetermined positions, said means comprising a device for acting on said clutch, a device. for engaging said cams to permit said device first named to operate, a device for engaging said turret, mechanism connecting said devices to effect their cordination, a rock shaft, and.

means comprising an arm connecting said shaft and device last named for disengaging said turret.

1G. In a grinding machine, a revoluble turret and work holders carried thereby, in combination with a reciprocating carriage, a slide movable on said carriage, a spindle journaled in said slide, a grinding wheel on and means for reciprocating said carriage. said means comprising a revoluble clutching device and mechanism operated by the movement of Said carriage for shifting said clutching device and reversing said movement.

17. In a grinding machine, a reciprocating carriage, a reciprocating slide movable on said carriage transversely to the movement thereof, a spindle journaled in said slide, a grinding wheel on said spindle, means for regulating the movement of said slide, means comprising automatically operated reversing devices for effecting a limited reciprocation of said carriage", and means for periodically shifting reversing devices afore- Said and effectinga fuller movement of said carriage.

,18. In a grinding machine, a reciprocating carriage, a spindle journaled in said carriage, and means for reciprocating said car-A riage, said means comprising automatically operating reversing devices for effecting a limited reciprocation of said means for periodically shifting reversing devices aforesaid to permit a continuation -of the rearward movement of Said carriage.

19. In a grinding machine, a reciprocating carriage, devices for automatically'reversing the movement of said carriage, and means comprising a revoluble cam for autocarriage and ally throwing 'the-reversing devices ont means for moving said carriage, devices for v reversing "thejmovement of' said carriage, and mechanism comprising ua revoluble cam,

a rock lever operated by said' cam, a striker "and meanswher'eby said lever shifts said f'actiony in a grinding machine, a reciproca- .'tory carriage,

'striker to throw' said reversing devices out f nismto ieii'ect 'the reverse movements of said c `r riage, 1neans comprising a revolnble mem- .b

' carriage rearwardly,v means whereby said carriage is 'stopped in' a predetermined position by fdiseng'aging said I mechanism, means whereby 'said yrevoluble member is 'stoppedisynchronously with said carriage,

cans for engaging said mechanism "to start r carriage forward, andmeans whereby riage 4adapted to said'i member is 'started-'by 'the movement of `1d"carriage. In afgrindi'ng machine, in g carriage, driving mechanism for moving said'carriag'e, reciprocating mechanism czn'rievd" by said carriagewhereby said 'cl-'riv. mg-mechanism is operated to reverse the movement of said carriage, `means lfor throwing 'saidf reciprocating mechanism .ont of coperatlve relatlon to said driving mech- I amsln to prevent reversing, wherebyffsaid carriage 1s permitted to continue its rearward movement, and means on said carriage for disengaglngA saidl driving mechanism. whereby said carriage is stopped.

23. ln a grinding machine, a base, a carria-ge adapted to reciprocate thereon, driving mechanism for reciprocating sald carriage, controlling mechanism carried by said carriage whereby said driving mechanism is caused to reverse the movement oi? said car-v -riage, means carried by said carriage whereby said controlling mechanism is vthrown out of coperative relation to said driving mechanism at a predetermined stage in the' operation, and means whereby said controlling mechanism is automaticallyl thrown by the 'movement of said carriage into coperative relationto said driving mechanism. 24e. In a grinding machine,- a base, a car reciprocate on said base,

'driving'. mechanism for reciprocating said carriage, controlling mechanism carried by said carriage whereby said driving mecha the movement 'of nism is caused to reverse said carriage, meanscomprismg a revoluble member carried by said carriage whereby said controlling mechanism 1S thrown out Y mechanism for moving said. Voluble member, 'means wherebysaidniemcarriage, devices for reversing said mecha-v prising "a clutch e controlled the movement of said car- ,iage for periodically ychanging the v` relation l '0f devices aforesaid to prevent reversing,

whereby said mechanism continues to move a reciprocata yournaled 'power transmitting mechanism carriage, and means carriedby' said carriage for controlling said driving mechanism, said means jcomprising a rocking. device, a revber operates-said device to change its relaf tion tosaid .driving mechanism, meanscomfor revolving said member,"v 'and means for automatically" operatingsaid clutch to controlthe movement isaid Vrev-y oluble member. 1"

26. in @grindingmaehinm besaenri-age adaptedgto reciprocate thereon, drivv mgmechanism for reclproc'atmg vsaid ,carf

riage, and means carried by 'said carriagefoifeontrolling said driving mechanism, said means comprising rocking mechanism adapted to shift Isaid driving mechanism,a link connected with said: rockingmechanism to 9c shift thev same,.a dog 'adap ted. to coact; with said link, Va' revoluble'member adaptedto throwsaid dog and link, and meanscomprising a clutch for driving saidmember, said dog being adapted for operating'. said clntch. 27. 1n a grinding machine, a recip'rhocatg l ing carriage, driving mechanism forrecipro- .eating said carriage,

and means for control- Y lin said mechanism, said means comprising shaft, means comprising if a clutchfor driving -said shaft, arevoluble member, means comprising' a' vdiferential hereby` said i shaft operates said member, a dog operated. by said member whereby said clutch isengaged and disengaged, rocking mechanism, and means operating under control of said revoluble member whereby said rocking mechanism is shifted. l

.28. 1n a grinding machine, a '1eciprocfii.v ing carriage, driving mechanism comprising reversing devices for reciprocating saidcarriage, and means for controlling said reverser ing devices, said means comprising a rocking mechanism, a link whereby said rocking 115 mechanism is adapted to be shifted, a lever adapted for shifting said link, a revoluble member adapted tor rocking said lever, means comprising a clutch and a diierential transmitting mechanismfor driving said 120 memben a' dog for shifting said clutch to ried by said carriage cr-controlling'said driving mechanism, and means for shifting said rocking mechanisnrwith relation to said driving mechanism, said means com- `prlsing a link connected with said rocking mechanism, a do adapted to be operated by said link, a clutc adalpted to be disen aged by said dog, a` revo uble member riven through said clutch, a dog connected with said link, said revoluble member having' movab e by said link out of its operativev position.

31. In a grinding machine, a reciprocaf tory, carriage, mechanism for moving said carriage, devices for reversing said mechanism to effect the reverse movement of said carriage, means for shifting said devices to prevent reversing whereby said mechanism continues to move said carriage, and means whereby said carriage disengages said mechanism and is-automatically stopped.

32. In a grinding machine, a slide, a s indle journaled in said slide, a grin ing wheel carried by said spindle and means for controlling the movements of said slide, said means comprising a revoluble cam, and means connecting said cam and slide for regulating the position of the latter.

33. In a grinding machine, a revoluble work holder, in combination with a slide movable transversely to-the axis of said work holder, av spindle journaled in said slide so as to be movablethereby trans- A versel to said axis, a wheel carried by said spind e for grinding said Work, and means riage adapted to reciprocate in the directionof the axis of the work holder, a-slide on said carriage adapted to vreciprocate transversely to said axis, a spindle journaled in saidl slide, a wheel carried by said spindle for operating on work carried by said holder, and means for regulatingv the posi tion. of said slide, said means comprising a spring, a revoluble cam and a lever rocked by said cam.

35. In a grinding machine, a Work holder, a carriage adapted to reciprocate to and from said holder, a slide adapted to reciprocate on said carriage transversely to the direction of movement thereof, a spindle -journaled in said 4slide transversely to the movement thereof, a wheel carried by said spindle for grinding work carried by said holder, means comprising controlling devices for reciprocating said carriage, and means for regulating the movement of said slide in cordination to the action of said controlling devices.

In testimony whereof we' have hereunto 75 set our names this 14th da of June, 1915.

CLEMENT BO TH. ALFRED CHARLES PAGE. 

